This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 12 |
| 6 | 26 |
| 7 | 57 |
| 8 | 128 |
| 9 | 291 |
| 10 | 670 |
| 11 | 1558 |
| 12 | 3655 |
| 13 | 8639 |
| 14 | 20554 |
| 15 | 49185 |
| 16 | 118301 |
| 17 | 285840 |
| 18 | 693480 |
| 19 | 1688683 |
| 20 | 4125882 |
| 21 | 10111393 |
| 22 | 24849532 |
| 23 | 61226546 |
| 24 | 151212789 |
| 25 | 374271925 |
| 26 | 928254590 |
| 27 | 2306569185 |
| 28 | 5741561804 |
| 29 | 14315544330 |
| 30 | 35748249574 |